What is the best way to pinpoint the origin of the element.style being injected by JavaScript?

I've been tasked with updating a client's WordPress website, but I'm still getting acquainted with the overall structure of the site.

When looking at the blog page (), I noticed that posts are displayed within a wrapper labeled #blogleft, as defined in the CSS file:

#blogleft {
  float: left;
  width: 580px;
}

However, upon inspecting the page, I found that the width is actually being overridden to 100%:

element.style {
  width: 100%;
}

My query is - what would be the most straightforward way to pinpoint where this override is coming from? My best guess is it might be injected by a JavaScript file somewhere on the site.

I've been digging around in the inspector for quite some time now. Is there an easy method to identify the origin of an injected inline style like this? All assistance is greatly appreciated!

javascripthtmlcssweb-inspector

Answer №1

It is evident that the width:100%; setting is embedded in the HTML code itself, as confirmed by examining the style attribute on the div tag within the HTML.

To simplify CSS and HTML troubleshooting, utilize developer tools/web inspector tools (found in firefox and chrome or via a plugin like Firebug). When using the element.style CSS selector, it indicates that the styling is directly coded into the selected element.

In this context, "hard coded" means the styling information is specifically inserted through the HTML code. Utilizing the developer tools/web inspector tools should enable you to identify where the particular CSS originates from.

Answer №2

To address the issue of an "injected stylesheet" in Chrome

  1. Access the developer console and navigate to the Network tab
  2. Filter the content to display only CSS files
  3. Identify extension domains that are loading CSS files
  4. Locate the specific extension in your extensions list by filtering the domain name (such as seen in the image "hcndlme...")
  5. Disable the extension and refresh the page to see if the issue persists

https://i.stack.imgur.com/aphGa.png

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